Radical-7 Warnings and Cautions
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Warning: Inaccurate SpHb and SpOC readings may be caused by:
• Improper sensor application
• Intravascular dyes such as indocyanine green or methylene blue
• Externally applied coloring and texture such as nail polish, acrylic
nails, glitter, etc.
• Elevated PaO2 levels
• Elevated levels of bilirubin
• Low arterial perfusion
• Motion artifact
• Low arterial oxygen saturation levels
• Elevated carboxyhemoglobin levels
• Elevated methemoglobin levels
• Hemoglobinopathies and synthesis disorders such as
thalassemias, Hb s, Hb c, sickle cell, etc.
• Vasospastic disease such as Raynaud's
• Elevated altitude
• Peripheral vascular disease
• Liver disease
• EMI radiation interference
Warning: Inaccurate SpCO and SpMet readings can be caused by:
• Improper sensor application
• Intravascular dyes such as indocyanine green or methylene blue
• Abnormal hemoglobin levels
• Low arterial perfusion
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